Ok so quick question about the o2 sensor,
Would having it disconnected cause any sort of issues while the car is cold? I have noticed that while my car is cold and I am cruising on decel (using the gears to maintain speed, ie. going down a hill in 5th my car will just sit at 80km/h without needing to apply the brake or accelerator), or while cruising with only very slight throttle, my car - for lack of a better word - 'surges'. What I mean is that it feels like the engine is slowing down a little bit and then it speeds back up again. It's not really enough to affect my speed as the speedo hardly registers it. But it's enough that I can feel it happening.
As far as I can recall, it has only started happening since my tuner disconnected my o2 sensor and tuned around it. And it only happens while the car is cold and as I understand it, only while it would be in closed loop. Is this likely to be the o2 sensor or something else, TP sensor maybe?
Sorry if I'm hijacking, it seemed remotely on topic
Posted 09 August 2011 - 11:18 AM
Engine: Link G4 Plug-In, Greddy Profec B-Spec II EBC, Haltech 3 bar MAP sensor, externally gated Hypergear ATR43 G3, Turbosmart Compgate40, 1000cc Injector Dynamics injectors, Plazmaman FFP, Plazmaman 72mm throttle body, JJR 3" bellmouth dump/front pipe, VENOM 5" 100 cell cat, 3" custom Kermit Engineering exhaust, Walbro 460lph fuel pump, Continental ethanol content sensor, GReddy FMIC, AGP triple core alloy radiator, stock GTR bov, custom Pro Fabrications alloy oil catch can/radiator overflow combo with Earls fittings, Splitfire coilpacks, HKS fuel rail, Sard FPR, Speedflow braided fuel and turbo lines, Performance Springs valve springs and retainers, Tomei Type-B Poncams, HKS exhaust cam gear, Headtorque custom bronze valve guides, ARP head studs.
Drivetrain: Exedy Ceramic racing clutch, custom driveshaft.
Suspension: BC Racing BR series coilovers, Kazama adjustable toe arms, polyurethane bushes, front strut bar.
Wheels & Brakes: 18" Wolf S36's, factory GTST brake calipers, RDA slotted rotors F&R, HEL braided lines, EBC Greenstuff front pads, Ferodo pads rear.
Exterior: GTR rear wing, Top Secret front bar, eyelids, custom retrofit projectors, HID's.
Interior: Sparco R505 racing seats driver and passenger, Recaro seat rails, ARK Design MFD, Zeitronix ethanol content analyzer, AEM wideband, 4x Shadow Pro series gauges, custom carbon fibre bits.
390rwhp @19psi on E53. Tuned by Danny Fisher at Garage 101.